overleaf/libraries/metrics
Eric Mc Sween c5778fdd05 Merge pull request #5488 from overleaf/em-refactor-logger
Refactor logger module to separate concerns

GitOrigin-RevId: cf9b1e367d881fb9036b2cb0f5c0529763a44695
2021-10-28 08:04:00 +00:00
..
.circleci
test
.eslintrc
.gitignore
.npmignore
.nvmrc
.prettierrc
buildscript.txt
CHANGELOG.md Merge pull request #5488 from overleaf/em-refactor-logger 2021-10-28 08:04:00 +00:00
event_loop.js
http.js Merge pull request #5488 from overleaf/em-refactor-logger 2021-10-28 08:04:00 +00:00
index.js Merge pull request #5488 from overleaf/em-refactor-logger 2021-10-28 08:04:00 +00:00
LICENSE
memory.js
mongodb.js
open_sockets.js
package-lock.json Merge pull request #5488 from overleaf/em-refactor-logger 2021-10-28 08:04:00 +00:00
package.json Merge pull request #5488 from overleaf/em-refactor-logger 2021-10-28 08:04:00 +00:00
prom_wrapper.js
README.md
timeAsyncMethod.js
uv_threadpool_size.js

overleaf/metrics-module

Wrappers the prom-client npm module to provide Prometheus metrics at /metrics.

Use:

const metrics = require('@overleaf/metrics')
metrics.initialize('myapp')

const express = require('express')
const app = express()
metrics.injectMetricsRoute(app)

Request logging can be enabled:

const logger = require('logger-sharelatex')
...
app.use(metrics.http.monitor(logger))

The metrics module can be configured through the following environment variables:

  • DEBUG_METRICS - enables display of debugging messages to the console.
  • ENABLE_TRACE_AGENT - enables @google-cloud/trace-agent on Google Cloud
  • ENABLE_DEBUG_AGENT - enables @google-cloud/debug-agent on Google Cloud
  • ENABLE_PROFILE_AGENT - enables @google-cloud/profiler on Google Cloud
  • METRICS_COMPRESSION_LEVEL - sets the compression level for /metrics
  • STACKDRIVER_LOGGING - toggles the request logging format
  • UV_THREADPOOL_SIZE - sets the libuv thread pool size